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Data center project · Denver County, Colorado

CoreSite Denver DE3 campus

Under construction · A three-building, 600,000-square-foot campus on a former concrete plant site in north Denver, under construction and the focus of neighborhood concern. Also known as: DE3.

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Status
Under construction · as of Oct. 6, 2025
Location
4900-5050 Race St., Globeville-Elyria-Swansea, Denver · Denver County
Status note
First building (about 170,000-180,000 sq ft) targeted for 2026; Denver's moratorium does not stop permitted construction, though later phases could face new rules.
Power
60 MW
Campus critical (IT) capacity per CoreSite; a company spokeswoman put maximum power need at 65-75 MW in 2024, and DCD reported the first building at 18 MW.
Floor area
600,000 sq ft
Developer and team
CoreSite (American Tower)
Utility
Xcel Energy
Water
Up to about 805,000 gallons a day at full build, per company figures reported in 2024; average use expected to be lower.
Incentives
Proposed 2024 Denver agreement returning half of site sales and use taxes, capped at $9 million over 15 years; council action not found in the sources reviewed.
Evidence
Primary public records
Size class
50 MW or more (tracker scope)
Map position approximate, from the reported address or area. Updated Oct. 17, 2026.

Updates, newest first

  1. May 18, 2026 Denver's one-year moratorium left permitted construction, including this project, untouched. (Colorado Newsline (via KUNC), Aug. 10, 2026)
  2. Oct. 6, 2025 CoreSite announced a construction milestone for DE3, about 180,000 sq ft, with opening expected in 2026 and a campus total of 60 critical MW. (CoreSite, Oct. 6, 2025)
  3. Oct. 18, 2024 Council members questioned the tax break over water and power use; CoreSite said maximum demand would be 65-75 MW and typical use under half of capacity. (Governing (Tribune Content Agency), Oct. 18, 2024)
  4. Aug. 30, 2024 DCD reported CoreSite was seeking a Denver tax agreement returning 50% of site sales and use taxes, up to $9 million, for a three-building campus of about 60 MW. (DatacenterDynamics, Aug. 30, 2024)

Conflicts and open questions

  • Addresses appear as 4900 Race St. (CoreSite) and 5050 Race St. (earlier reporting); DCD said they appear to be one site.
  • First-building size differs: about 180,000 sq ft (CoreSite, 2025) and about 170,000 sq ft (Colorado Politics photo caption).

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